STEVAL-ISA051V1 STMicroelectronics, STEVAL-ISA051V1 Datasheet - Page 46

• Manufacturer Part Number: STEVAL-ISA051V1
• Description: BOARD EVAL PM6670S DDR2/3
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of STEVAL-ISA051V1

• Design Resources: STEVAL-ISA051V1 Gerber Files STEVAL-ISA051V1 Schematic STEVAL-ISA051V1 Bill of Material
• Main Purpose: Special Purpose DC/DC, DDR Memory Supply
• Outputs And Type: 4, Non-Isolated
• Voltage - Output: 1.5V, 1.8V
• Voltage - Input: 4.5 ~ 28V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: PM6670
• Input Voltage: 4.5 V to 28 V
• Output Voltage: 1.8 V, 1.5 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: PM6670S
• Kit Application Type: Power Management
• Application Sub Type: DDR2/3 Memory Power Supply Controller
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: PM6670S
• Other names: 497-8411

Application information
8.1.5
46/54
Tested low-side MOSFETs are listed in
Table 17.
Dual N-MOS can be used in applications with lower output current.
Table 18
Table 18.
Diode selection
A rectifier across the synchronous switch is recommended. The rectifier works as a voltage
clamp across the synchronous rectifier and reduces the negative inductor swing during the
dead time between turning the high-side MOSFET off and the synchronous rectifier on.
Moreover it increases the efficiency of the system.
Choose a schottky diode as long as its forward voltage drop is very little (0.3 V). The reverse
voltage should be greater than the maximum input voltage V
reverse charge is preferable.
Table 19.
Manufacturer
Manufacturer
Manufacturer
ST
ST
ST
IR
ST
ST
IR
shows some suitable dual MOSFETs for applications requiring about 3 A.
Evaluated low-side MOSFETs
Suitable dual MOSFETs
Evaluated recirculation rectifiers
STS8DNH3LL
STS12NH3LL
STS25NH3LL
STPS1L30M
STPS1L30A
IRF7313
IRF7811
Type
Type
Type
Table 19
R
R
voltage (V)
Doc ID 14432 Rev 4
DSon
DSon
Forward
13.5
0.34
0.34
4.0
25
46
24
(mΩ)
(mΩ)
shows some evaluated diodes.
Table 17
Gate charge (nC)
Rated reverse
.
voltage (V)
C
GD
0.069
0.011
0.054
30
30
10
33
\ C
GS
INmax
and a minimum recovery
Rated reverse voltage (V)
Rated reverse voltage (V)
Reverse current (μA)
0.00039
0.00039
30
30
30
30
30
PM6670S